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JAST (Journal of Animal Science and Technology) TITLE PAGE Upload this completed form to website with submission ARTICLE INFORMATION Fill in information in each box below Article Type Research article Article Title (within 20 words without abbreviations) Complete genome sequence of Paenibacillus konkukensis sp. nov. SK3146 as a potential probiotic strain Running Title (within 10 words) Complete genome sequence of Paenibacillus konkukensis sp. nov. SK3146 Author Hae-In Jung1, Sungkwon Park2, Kai-Min Niu3, Sang-Won Lee4, Damini Kothari1, Kwon Jung Yi1, and Soo-Ki Kim1 Affiliation 1 Department of Animal Sciences and Technology, Konkuk University, Seoul 05029, Korea 2 Department of Food Science and Biotechnology, Sejong University, Seoul 05005, Korea 3 Institute of Biological Resources, Jiangxi Academy of Sciences, Nanchang 330029, China 4 College of Veterinary Medicine, Konkuk University, Seoul 05029, Korea ORCID (for more information, please visit Hae-In Jung (https://orcid.org/ 0000-0003-2643-6681) https://orcid.org) Sungkwon Park(https://orcid.org/0000-0002-7684-9719) Kai-Min Niu (https://orcid.org/0000-0002-9756-3517) Sang-Won Lee (https://orcid.org/0000-0003-1956-7245) Damini Kothari (https://orcid.org/0000-0003-3627-2377) Kwon Jung Yi (https://orcid.org/0000-0001-6002-0378) Soo-Ki Kim (https://orcid.org/ 0000-0003-3499-3330) Competing interests No potential conflict of interest relevant to this article was reported. Funding sources Not applicable. State funding sources (grants, funding sources, equipment, and supplies). Include name and number of grant if available. Acknowledgements This research was supported by a grant from Agricultural Science and Technology Development Program (Project No. PJ010906), Rural Development Administration, Republic of Korea. Availability of data and material Upon reasonable request, the datasets of this study can be available from the corresponding author. Authors' contributions Conceptualization: Jung HI, Lee SW, Park SK, Kim SK. Please specify the authors’ role using this form. Data curation: Jung HI. Formal analysis: Jung HI, Niu KM ACCETEDMethodology: Jung HI. Validation: Jung HI, Lee SW Investigation: Jung HI. Yi KJ Writing - original draft: Jung HI, Lee SW Writing - review & editing: Niu KM, Lee SW, Park SK, Kim SK. Ethics approval and consent to participate This article does not require IRB/IACUC approval because there are no human and animal participants. CORRESPONDING AUTHOR CONTACT INFORMATION For the corresponding author (responsible for Fill in information in each box below correspondence, proofreading, and reprints) First name, middle initial, last name Soo-Ki Kim Email address – this is where your proofs will be sent [email protected] Secondary Email address [email protected] Address Department of Animal Sciences and Technology, Konkuk University, Seoul 05029, Korea. Cell phone number +82-10-2965-3728 Office phone number +82-2-450-3728 Fax number +82-2-458-3728 ACCETED Abstract Paenibacillus konkukensis sp. nov., SK3146 is a novel strain isolated from a pig feed. Here, we present complete genome sequence of SK3146. The genome consists of a single circular genome measuring 7,968,964 bp in size with an average G+C content of 53.4%. Genomic annotation revealed that the strain encodes 151 proteins related to hydrolases (EC3), which was higher than those in Bacillus subtilis and Escherichia coli. Diverse kinds of hydrolases including galactosidase, glucosidase, cellulase, lipase, xylanase, and protease were found in the genome of SK3146, coupled with one bacteriocin encoding gene. The complete genome sequence of P. konkukensis SK3146 indicates the immense probiotic potential of the strain with nutrient digestibility and antimicrobial activity functions. Keywords: Paenibacillus, Complete genome sequence, Exoenzyme, Feed additive ACCETED The well-being and health status of economic animals are more deteriorative due to the intensive farming practices. Feed-additives probiotics including lactic acid bacteria and Bacillus spp. are commonly used to modulate host health and improve performance in pig production [1, 2]. Typically, a culture-dependent isolation coupled with in-vitro characterization methods have been used to establish probiotic potential of the strains. Due to rapid development of next generation sequencing in the past decade, scientists are now exploring whole genome sequencing to identify and functionally characterize novel probiotic strains. A number of potential probiotic strains have been identified based on their putative functional genes from their whole genome [3]. Paenibacillus spp. are well known as growth promoters for crops, but there are very limited studies exploring their probiotic potentials, despite the fact that they can produce diverse kinds of active substances namely antimicrobial peptides (bacteriocin and lipopeptide), volatile organic compounds, and digestive enzymes (amylase, cellulase, lipase, protease, etc), among many others [4]. Previously, we have isolated a novel Paenibacillus strain SK3146T (=KACC 18876T=LMG 29568T) from a pig feed, which was taxonomically assigned as Paenibacillus konkukensis sp. nov. [5]. In this study, we provide a detailed description of the complete genome sequence of SK3146 and analyzed its putative functional genes related to digestive enzymes and bacteriocin which could be beneficial attributes as a functional feed additive. SK3146 was cultured in Luria-Bertani broth for two days at 37℃ under shaking conditions (100 rpm). Genomic DNA of SK3146ACCETED was extracted using the Wizard Genomic DNA Purification Kit (Promega Corporation, Madison, WI, USA) according to the manufacturer’s instructions. The genome of SK3146 was completely sequenced using the PacBio® RS II system by Macrogen Inc. (Seoul, South Korea). The PacBio RS II system libraries were prepared using the SMRTbell template prep kit v 1.0. In total, 142,242 bp PacBio subreads with 1,041,901,553 bp were generated using the PacBio® RS II system, and their meal length and N50 value were 7,324 and 10,697 bp, respectively. The sequencing reads were de novo assembled using the HGAP analysis with default options. The assembly was completed with the PacBio RS II system. Annotation of coding DNA sequence (CDS) and functional genes were analyzed by the Prokka v1.10. The general features of the SK3146 were analyzed based on its complete genome sequence using the Geneious 8.1.9 software (Biomatters, New Zealand) [6]. The predicted CDS were classified depending on the clusters of orthologous genes (COG), followed by the construction of a circular genome map and analysis of protein function by a web server: Bacterial Annotation System (https://www.basys.ca/) [7]. The circular genome visualization and general features of SK3146 genome are presented in Fig. 1 and summarized in Table 1, respectively. The complete genome of the strain consists of a single circular chromosome measuring 7,968,964 bp in size and 53.4% in G+C content. A total of 6,988 genes were predicted in the genome including 6,842 CDS, 37 ribosomal RNAs (rRNA), 108 transfer RNAs (tRNA), and 1 transfer-messenger RNA (tmRNA) loci. In addition, 10 CRISPR elements, three prophage regions, and 16 IS elements were identified in the genome. Furthermore, we have analyzed the presence of potential enzymes in the genome of SK3146 via protein function annotation with the Kyoto Encyclopedia of Genes and Genomes database, which provide specific substrates, reactions, and enzyme nomenclature [8]. We then categorized the genes encoding potential enzymes of SK3146 according to enzyme code number. The class of hydrolases (EC3) including galactosidase, glucosidase, cellulase, lipase, xylanase, protease, and others in SK3146 are listed in Table 2. EC3 hydrolases including phosphatases, glycosidases, peptidases, nucleosidases, and lipases are widely used in feed additive industry to improve digestibility and bioavailability of nutrients in animal feeds [9]. Besides enzyme encoding genes, one bacteriocin encoding gene was also foundACCETED on the chromosome of SK3146. The hydrolytic enzymes such as glucanase, cellulase, protease, and chitinase of Paenibacillus have been reported to have anti-fungal activities via destruction of fungal cell wall [10]. Moreover, β-glucosidase, cellulase, xylanase, and protease have been demonstrated to reduce carbohydrate- and protein-based anti-nutritional factors present in the plant-derived protein sources and consequently improving the nutritional quality of feed [11]. In the present study, the complete genome of P. konkukensis sp. nov., SK3146 isolated from a pig feed has been reported. The genome of SK3146 encodes multiple enzymes that could be applied to improve the digestibility and bioavailability of nutrients of animal feed. A gene encoding bacteriocin was also identified. Thus, the genome mining conducted in this study suggests that stain SK3146 has significant potential as a probiotic for use in feed additive applications. In addition, the genome information of SK3146 widens our understanding on the whole genus of Paenibacillus to explore and develop next generation probiotics. The genome-based protein prediction will be validated by in vitro characterization and in vivo animal study in near future. Genomic sequence accession number The complete genome sequence of P. konkukensis sp. nov., SK3146 was deposited in the GenBank under the accession number CP027059. ACCETED References 1. Barba-Vidal E, Martin-Orue SM, Castillejos L. Practical aspects of the use of probiotics in pig
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